Two-piece jar closure



Aug. 1, 1933. J. J. WiLLlAMS 1,920,286

TWO-PIECE JAR CLOSURE Filed July 21, 1951 gwuentoz atfmmql Patented Aug. 1, 1933 UNITED STATES PATENT OFFICE TWO-PIECE ma CLOSURE Application July. 21, 1931.

Serial No. 552,255

4 Claims. (01. 215-97.)

This invention relates to bottle and jar closures and especially to the type in which a disc-like top of glass or similar material is forced down upon its seat by a screw ring and is held in this 5 position by the ring until the jar is to be opened.

In closures of this type it is usual to employ a screw ring having an inturned flange for engaging the upper surface of the closure adjacent its periphery. Considerable pressure is transmitted to this flange both in the closing operation and during the processing of the contents of the jar. Therefore, in order to avoid distortion of the flange it has heretofore been found necessary to employ heavy gauge metal in forming the screw ring. This use of heavy sheet metal was also due in part to the defective design of closures which permitted a leverage action such as would greatly amplify the bending stresses on the inturned flange.

It is an object of the present invention therefore to so construct closures of this class as to eliminate any multiplication of the pressures on the flange of the screw ring and thereby permit the use of a lighter gauge metal with a consequent saving in cost of manufacture.

A further object of the invention resides in a special reinforcement formed on the flange of the screw ring which serves to strengthen the same and prevent distortion.

Other objects and advantages of the invention will be apparent from the following description when taken in connection with the accompanying drawing, in which Figure 1 is a perspective view of the upper 85 portion of a jar showing the novel closure mounted thereon.

'F'igure 2 is a vertical sectional view taken through the upper portion of the jar and closure.

Figure 3 is an enlarged fragmentary sectional 40 view showing the sealing joint between the jar and closure; and

Figure 4 is a detailed plan view of a portion of the under side of the closure disc.

Referring to the drawing in more detail, the

numeral 1 indicates a conventional glass jar provided with a neck portion 2 surrounding the mouth 3. The neck portion 2 is formed with the usual integral shoulder 4 and spaced above the same are conventional screw threads 5.

The closure proper consists of a disc-like member 6 formed of glass or the like and provided with a downwardly directed guiding flange 7 adapted to enter the mouth 2 of the receptacle.

The portion of the disc 6 extending beyond the flange 7 is preferably provided with a rib 8 which is adapted to embed itself in the sealing ring 8' of rubber or the like which is usually interposed between the mouth of the jar and the closure.

It is to be noted that in this particular instance the outer edge of the disc-like member 6 is upwardly tapered as indicated at 9, and this edge terminates in a bead l0, projecting upwardly above the surface of the disc.

For drawing the closure member down on its seat and for securing the same in sealing position until such time as the jar is to be opened,

a fastener ring indicated generally by the numeral 11 is provided. This ring comprises a downwardly and outwardly flared skirt portion and an inwardly directed flange on the upper edge of the skirt portion which is adapted to engage the upper surface of the sealing disc 6. The skirt portion of the sealing ring is corrugated as indicated by the numeral 12 and the taper of this portion of the skirt is such as to conform to the taper 9 of the outer edge of the closure disc 6. The lower portion, of the skirt is provided with screw threads 13 adapted to cooperate with the threads 5 formed on the neck of the jar.

The upper edge of the skirt of the fastener ring is provided with an inturned flange 14, and this flange is reinforced by the provision of two spaced ribs 15. and 16. The rib 15 is of such dimension as to provide an annular cavity of sufficient dimension to receive the bead 10 formed on the periphery of the closure as clearly indicated in Figure 3.

From an inspection of Figures 2 and 3, it will be noted that the line of pull of the screw ring in drawing the disc 6 tightly down upon its seat inclines upwardly from the threads 5 through head 10 and rib 15. By reason of the construction which provides for this direct line of pull through the edge of the closure and the threads of the receptacle, there is no tendency to provide a leverage action in the flange 14 as would be the case if the line of pull on the ring were spaced beyond the dge of the closure as in prior 10o constructions. Moreover by reason of the employment of the ribs 15 and 16 the flange itself is strengthened. 4 Due to these two features, namely, the construction of the ring to place the line of pull in the manner described and the reinforcement of the flange 14, the screw ring fastener may be made of a much lighter gauge metal than is the case in the ordinary construction of screw rings as heretofore. practiced. Consequently the cost of production of the ring fastener 1 and the closure as a whole is substantially reduced and a tighter and safer seal results.

In accordance with the patent statutes, I have described what I now believe to be the preferred form of the invention but since it is obvious that various minor changes may be made in the details oi construction without departing from the spirit of the invention, it is intended that all such changes be included within the scope of the appended claims.

What I claim is:

1. The combination with a glass container. a closure seated on the container mouth, an annular bead on the top of the closure adjacent the edge thereof, the edge of the closure being in substantial alignment with the neck oi. the container,

and the inturned portion of the ring engagedthereover, for the purpose'described. I r

2. The combination with a glass container, a closure seated on the container mouth, an annular bead on the top of the closure adjacent the edge thereof, threads formed on the neck 01' the container, a fastener ring, said ring including an outwardly flared skirt, an inturned portion at the top of the skirt engaging over said head. and threads adjacent the lower portion of the skirt and engaging the threads onthe container. the line of pull being through said bead and the inturned portion of the ring engaged thereover.

3. The combination with a glass container, a closure seated on the container mouth, an annular bead on the top of the closure adjacent the edge thereof, threads formed on the neck of the container, a fastener ring, said ring including an outwardly flared skirt, an inturned portion at the top of the skirt engaging over said bead. a flange extending inwardly from said inturned portion and provided with an annularlib. and threads adjacent the lower portion of the skirt engaging the threads on the container, the line of pull being through said head and the inturned portion of the ring engaged thereover.

4. The combination with a glass container, a closure seated on the container month, an annular bead on the top of the closure adjacent the edge thereof, threads formed on the neck of the container, a fastener ring, said ring including an outwardly flared skirt, corrugations formed on the skirt, an inturned portion at the top of the skirt engaging over said bead, and threads adjacent the lower portion of the skirt and engaging the threads on the container, the line of pull being through said head and the inturned portion of the ring engaged thereover.

JOHN J. WILLIAMS. 

